Patch Tuesday briefly – one 0-day mounted, however no patches for Alternate! – Bare Safety

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Patch Tuesday briefly – one 0-day mounted, however no patches for Alternate! – Bare Safety


Two weeks in the past we reported on two zero-days in Microsoft Alternate that had been reported to Microsoft three weeks earlier than that by a Vietnamese firm that claimed to have stumbled throughout the bugs on an incident response engagement on a buyer’s community. (You could have to learn that twice.)

As you in all probability recall, the bugs are harking back to final yr’s ProxyLogin/ProxyShell safety issues in Home windows, though this time an authenticated connection is required, which means that an attacker wants not less than one consumer’s electronic mail password prematurely.

This led to the amusing-but-needlessly-confusing identify ProxyNotShell, although we confer with it in our personal notes as E00F, brief for Alternate double zero-day flaw, as a result of that’s more durable to misinterpret.

You’ll in all probability additionally bear in mind the necessary element that the primary vulnerability within the E00F assault chain could be exploited after you’ve achieved the password a part of logging on, however earlier than you’ve achieved any 2FA authentication that’s wanted to finish the logon course of.

That makes it into what Sophos knowledgeable Chester Wisniewski dubbed a “mid-auth” gap, somewhat than a real post-authentication bug:

One week in the past, after we did a fast recap of Microsoft’s response to E00F, which has seen the corporate’s official mitigation recommendation being modified a number of instances, we speculated within the Bare Safety podcast as follows:

I did check out Microsoft’s Guideline doc this very morning [2022-10-05], however I didn’t see any details about a patch or when one shall be out there.

Subsequent Tuesday [2022-10-11] is Patch Tuesday, so possibly we’re going to be made to attend till then?

Sooner or later in the past [2022-10-11] was the newest Patch Tuesday

…and the most important information is nearly definitely that we have been fallacious: we’re going to have to attend but longer.

All the things besides Alternate

This month’s Microsoft patches (variously reported as numbering 83 or 84, relying on the way you rely and who’s counting) cowl 52 completely different components of the Microsoft ecosystem (what the corporate descibes as “merchandise, options and roles”), together with a number of we’d by no means even heard of earlier than.

It’s a dizzying listing, which we’ve repeated right here in full:

Energetic Listing Area Companies
Azure
Azure Arc
Shopper Server Run-time Subsystem (CSRSS)
Microsoft Edge (Chromium-based)
Microsoft Graphics Part
Microsoft Workplace
Microsoft Workplace SharePoint
Microsoft Workplace Phrase
Microsoft WDAC OLE DB supplier for SQL
NuGet Shopper
Distant Entry Service Level-to-Level Tunneling Protocol
Function: Home windows Hyper-V
Service Material
Visible Studio Code
Home windows Energetic Listing Certificates Companies
Home windows ALPC
Home windows CD-ROM Driver
Home windows COM+ Occasion System Service
Home windows Related Consumer Experiences and Telemetry
Home windows CryptoAPI
Home windows Defender
Home windows DHCP Shopper
Home windows Distributed File System (DFS)
Home windows DWM Core Library
Home windows Occasion Logging Service
Home windows Group Coverage
Home windows Group Coverage Desire Shopper
Home windows Web Key Alternate (IKE) Protocol
Home windows Kernel
Home windows Native Safety Authority (LSA)
Home windows Native Safety Authority Subsystem Service (LSASS)
Home windows Native Session Supervisor (LSM)
Home windows NTFS
Home windows NTLM
Home windows ODBC Driver
Home windows Notion Simulation Service
Home windows Level-to-Level Tunneling Protocol
Home windows Moveable Machine Enumerator Service
Home windows Print Spooler Elements
Home windows Resilient File System (ReFS)
Home windows Safe Channel
Home windows Safety Assist Supplier Interface
Home windows Server Remotely Accessible Registry Keys
Home windows Server Service
Home windows Storage
Home windows TCP/IP
Home windows USB Serial Driver
Home windows Net Account Supervisor
Home windows Win32K
Home windows WLAN Service
Home windows Workstation Service

As you possibly can see, the phrase “Alternate” seems simply as soon as, within the context of IKE, the web key change protocol.

So, there’s nonetheless no repair for the E00F bugs, per week after we adopted up on our article from per week earlier than that about an preliminary report three weeks earlier than that.

In different phrases, should you nonetheless have your individual on-premises Alternate server, even should you’re solely operating it as a part of an energetic migration to Alternate On-line, this month’s Patch Tuesday hasn’t introduced you any Alternate aid, so be sure to are up-to-date with Microsoft’s newest product mitigations, and that you realize what detection and menace classification strings your cybersecurity vendor is utilizing to warn you of potential ProxyNotShell/E00F attackers probing your community.

What did get mounted?

For an in depth evaluate of what obtained mounted this month, head over to our sister web site, Sophos Information, for an “insider” vulns-and-exploits report from SophosLabs:

The highlights (or lowlights, relying in your viewpoint) embrace:

  • A publicly disclosed flaw in Workplace that would result in information leakage. We’re not conscious of precise assaults utilizing this bug, however details about how one can abuse it was apparently recognized to potential attackers earlier than the patch appeared. (CVE-2022-41043)
  • A publicly exploited elevation-of-privilege flaw within the COM+ Occasion System Service. A safety gap that’s publicly recognized and that has already been exploited in real-life assaults is a zero-day, as a result of there have been zero days that you can have utilized the patch earlier than the cyberunderworld knew how one can abuse it. (CVE-2022-41033)
  • A safety flaw in how TLS safety certificates get processed. This bug was apparently reported by the federal government cybersecurity companies of the UK and the US (GCHQ and NSA respectively), and will enable attackers to misrepresent themselves because the proprietor of another person’s code-signing or web site certificates. (CVE-2022-34689)

This month’s updates apply to just about each model of Home windows on the market, from Home windows 7 32-bit all the way in which to Server 2022; the updates cowl Intel and ARM flavours of Home windows; and so they embrace not less than some fixes for what are referred to as Server Core installs.

(Server Core is a stripped-down Home windows system that leaves you with a really primary, command-line-only server with a tremendously decreased assault floor, leaving out the form of parts you merely don’t want if all you need is, for instance, a DNS and DHCP server.)

What to do?

As we clarify in our detailed evaluation on Sophos Information, you possibly can both head into Settings > Home windows Replace and discover out what’s ready for you, or you possibly can go to Microsoft’s on-line Replace Information and fetch particular person replace packages from the Replace Catalog.

Replace below means on Home windows 11 22H2.

You recognize what we’ll say/
   ‘Trigger it’s at all times our means.

That’s, “Don’t delay/
   Merely do it immediately.”


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